- Obituary (2007 Hits)
- Obscurity (3183 Hits)
- Officium Triste (1492 Hits)
- Omission (1364 Hits)
- Omnium Gatherum (262 Hits)
- Onheil (976 Hits)
- Onkel Tom Angelripper (1023 Hits)
- Onslaught (1934 Hits)
- Oppressus (1674 Hits)
- Orae (1518 Hits)
- Orden Ogan (1613 Hits)
- Out For Blood (1012 Hits)
- Outrage (JPN) (681 Hits)
- Overkill (1430 Hits)
- Ozzy Osbourne (1557 Hits)